A5087186936- Electrostatics and Colloid Interactions
- Microfluidic and Bio-sensing Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Nanopore and Nanochannel Transport Studies
- Micro and Nano Robotics
Carnegie Mellon University
2022-2024
A concentration gradient of surfactants in the presence polymers that non-covalently associate with will exhibit a continually varying distribution complexes different composition, charge, and size. Since diffusiophoresis colloids suspended solute depends on relaxation interactions between solutes particles, polymer/surfactant complexation alter rate driven by surfactant gradients relative to observed same absence polymers. microfluidic device was used measure solutions containing sodium...
When placed in an ionic surfactant gradient, charged colloids will undergo diffusiophoresis at a velocity, uDP = MDP∇ ln S, where MDP is the diffusiophoretic mobility and S concentration. The depends part on charges diffusivities of surfactants their counterions. Since micellization decreases diffusivity alters charge distributions solution, gradients may differ significantly when concentrations are above or below critical micelle concentration (CMC). role micelles driving unclear,...
Diffusiophoresis refers to the motion of a colloidal particle in solute concentration gradient, animated by particle–solute interactions. We present theoretical analysis diffusiophoretic viscous drop gradient neutral at zero Reynolds number. In spatially uniform translational velocity spherical was found Anderson et al. ( J. Fluid Mech. , vol. 117, 1982, pp. 107–121). Here, we show additionally that experiences no tendency deform, regardless magnitude interfacial tension interface and...